Hello giladaya,
this really looks great. I was searching for some nice Matrix Animations and started a thread, which was not very succesful
LED Matrix - animation pattern.
I´ll try to port your code to my matrix and go on collecting some nice effects 
Some time ago I wrote a .NET program which can demonstrate matix animations on a PC. Maybe I´ll release it to make it easier to create some new effects.
Greetings
Thomas